/**
 * Copyright 2011 FeedDreamwork SIG
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.feeddreamwork.processors;

import java.util.*;

import org.feeddreamwork.*;
import org.feeddreamwork.feed.*;

public class RemoveRedundancyProcessor implements FeedProcessor {
	@Override
	public void process(FeedContext context) {
		Utils.throwIfNull(context);
		Utils.throwIfNull(context.getFeed());

		List<String> titles = new ArrayList<String>();
		List<String> links = new ArrayList<String>();
		Iterator<Entry> iter = context.getFeed().getEntries().iterator();
		while (iter.hasNext()) {
			Entry entry = iter.next();
			if (titles.contains(entry.getTitle())
					|| links.contains(entry.getLink()))
				iter.remove();
			else {
				titles.add(entry.getTitle());
				links.add(entry.getLink());
			}
		}
	}
}
